WO2016079082A1 - Appareil d'imagerie par rayons x à prise unique et méthode pour imagerie en trois dimensions d'empreintes dentaires - Google Patents

Appareil d'imagerie par rayons x à prise unique et méthode pour imagerie en trois dimensions d'empreintes dentaires Download PDF

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Publication number
WO2016079082A1
WO2016079082A1 PCT/EP2015/076751 EP2015076751W WO2016079082A1 WO 2016079082 A1 WO2016079082 A1 WO 2016079082A1 EP 2015076751 W EP2015076751 W EP 2015076751W WO 2016079082 A1 WO2016079082 A1 WO 2016079082A1
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WO
WIPO (PCT)
Prior art keywords
ray
digital
patient
computer system
ray imaging
Prior art date
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Ceased
Application number
PCT/EP2015/076751
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English (en)
Inventor
Stefan Kaltenbach
Ludwig Laxhuber
Holger Essig
Guido Gäßler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orangedental & Co KG GmbH
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Orangedental & Co KG GmbH
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Filing date
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Application filed by Orangedental & Co KG GmbH filed Critical Orangedental & Co KG GmbH
Publication of WO2016079082A1 publication Critical patent/WO2016079082A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
    • A61B6/5235—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/46—Arrangements for interfacing with the operator or the patient
    • A61B6/461—Displaying means of special interest
    • A61B6/466—Displaying means of special interest adapted to display 3D data
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/46—Arrangements for interfacing with the operator or the patient
    • A61B6/467—Arrangements for interfacing with the operator or the patient characterised by special input means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5223—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data generating planar views from image data, e.g. extracting a coronal view from a 3D image
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions

Definitions

  • the present invention relates to the field of digital imaging, especially to three- dimensional (3-D) imaging in dentistry.
  • the invention particularly concerns apparatuses and methods for three-dimensional imaging of objects, such as dental casts.
  • Cephalometric one-shot X-ray apparatuses provide 2-D images of a patient's teeth.
  • the patient may be standing or sitting in a chair during the recording of the 2-D image.
  • the patient's head is kept in a fixed position during the recording so as to avoid that the image gets blurred because of movements of the patient's head.
  • the patient's head can be fixed by using a bite block, a chin rest, a forehead rest or by any combination of these.
  • the patient's head may additionally or alternatively be fixed to the headrest during the recording.
  • one-shot X-ray apparatuses the image is recorded in one step using a single cone- shaped or pyramid- shaped X-ray beam.
  • older X-ray scan systems used a flat fan- shaped X-ray beam which is swept horizontally (or vertically) in such a manner that the beam covers the complete screen of the X-ray detector in the course of the recording.
  • One-shot X- ray apparatuses are advantageous over X-ray scan systems in that the former need only a fraction of the time for recording one image as compared to the latter.
  • the X-ray radiation source and the X-ray detector are stationary during the recording, i.e. during the shot.
  • the X-ray source and the X-ray detector are movably mounted so that the dentist (or the dental assistant or the radiographer) can move X-ray source and X-ray detector prior to the shot in order to focus on the part of the dental arch that is to be imaged.
  • CT computed tomography
  • CBCT cone- beam CT
  • X-ray source and X-ray detector are typically mounted on opposite ends of a rotary arm so that X-ray source and X-ray detector maintain a fixed distance to each other.
  • the rotary arm is rotatably mounted to the CT apparatus.
  • the object i.e. the patient's upper jaw and lower jaw
  • the object is positioned between the X-ray source and X-ray detector.
  • the object is positioned half-way between the X-ray source and the X- ray detector so that the distance between X-ray source and the object stays about the same during the recording step. Likewise, the distance between X-ray detector and the object stays about the same during the recording step.
  • the rotary arm makes a rotation of between 180° and 360° so that the X-ray source and X-ray detector revolve around the object.
  • the digital X-ray detectors used in CT systems capture several digital images of the object.
  • the digital image data is transmitted to a computer, which computes a 3-D image on the basis of the image data received from the X-ray detectors.
  • TECHNICAL PROBLEMS UNDERLYING THE PRESENT INVENTION AND THEIR SOLUTION Dentists and dental surgeons have a need for digitizing three-dimensional (3-D) structures of dental casts (e.g. plaster models of a patient's upper and/or lower teeth) so as to facilitate storing, forwarding and/or printing of the data of the dental cast.
  • dental casts e.g. plaster models of a patient's upper and/or lower teeth
  • dentists use a laser scanning apparatus for digitizing dental casts.
  • WO 2014/164405 describes the use computed tomography (CT) systems as used in dentist's offices to scan plaster models or impressions of a patient's teeth.
  • CT systems are still relatively expansive and take up a lot of space.
  • the content of WO 2014/164405 is hereby incorporated by reference in its entirety.
  • one-shot cephalometric systems are much cheaper and require less space than CT systems.
  • the present inventors found out that dental casts can be digitized by using cephalometric one- shot X-ray imaging apparatuses that are basically only capable of providing 2-D images.
  • the inventors modified a one-shot cephalometric apparatus in such a manner that the apparatus is capable of providing 3-D images of objects. Accordingly, the present invention provides an additional use for conventional one- shot 2-D X-ray imaging apparatuses used in dentist's offices.
  • the present invention relates to an X-ray imaging apparatus suitable for cephalometric one-shot 2-D X-ray imaging, wherein said apparatus comprises:
  • an X-ray digital detector to receive the radiation from the X-ray radiation source and to transmit digital data to a computer system
  • said software program is capable of calculating a digital 3-D model of an object positioned on the rotatable table on the basis of the digital data transmitted to the computer system; and wherein the software program is capable of saving the data of the calculated digital 3-D model in a storage medium being part of the computer system;
  • the apparatus is not capable of performing 3-D X-ray imaging, when the rotatable table is absent.
  • the present invention relates to a method for calculating a digital 3- D model of an object, comprising the steps:
  • the present invention relates to a cephalometric one-shot 2-D X-ray imaging apparatus comprising means for implementing a method as defined in the second aspect.
  • the present invention is directed to an X-ray imaging apparatus suitable for cephalometric one-shot 2-D X-ray imaging, wherein said apparatus comprises:
  • an X-ray digital detector to receive the radiation from the X-ray radiation source and to transmit digital data to a computer system
  • said software program is capable of calculating a digital 3-D model of an object positioned on the rotatable table on the basis of the digital data transmitted to the computer system; and wherein the software program is capable of saving the data of the calculated digital 3-D model in a storage medium being part of the computer system;
  • the present inventors modified cephalometric one- shot X-ray imaging apparatuses that are generally only capable of providing 2-D images (but no 3-D images) in such a manner that the apparatus is capable of providing 3-D images of objects.
  • the modifications by which this effect was achieved are the addition of a rotatable table, a control system for rotating the rotatable table, and a special software program that calculates a digital 3-D model of an object positioned on the rotatable table on the basis of the digital data transmitted from the X-ray digital detector.
  • the apparatus of the first aspect does not include X-ray imaging apparatuses (such as CT apparatuses) that are already capable of calculating 3-D images in the absence of these modifications.
  • proviso recited in the first aspect could alternatively (or additionally) be worded as "with the proviso that the apparatus is not capable of performing 3-D X-ray imaging, when the control system or rotating the rotatable table is absent".
  • the proviso could alternatively be worded as "with the proviso that the apparatus is not capable of performing computed tomography ( CT), when the rotatable table or the control system for rotating the rotatable table or both is/are absent".
  • the apparatus further comprises an object positioned on the rotatable table.
  • the object is selected from the group consisting of a plaster model of a patient's upper teeth, a plaster model of a patient's lower teeth, an imprint of a patient's upper teeth, and an imprint of a patient's lower teeth.
  • the apparatus may comprise more than one object (e.g. 2, 3, 4, 5, 6, 7, 8, 9, 10 or more objects) positioned on the rotatable table.
  • a plaster model of a patient's upper teeth and a plaster model of a patient's lower teeth may be positioned on the rotatable table at the same time.
  • an imprint of a patient's upper teeth and an imprint of a patient's lower teeth may be positioned on the rotatable table at the same time.
  • the present invention is directed to a method for calculating a digital 3-D model of an object, comprising the steps:
  • the predefined angle is between 200° and
  • 360° preferably between 220° and 360°; and more preferably between 240° and 360°.
  • the pre-defined angle is 360°.
  • the method further comprises the step:
  • the object is selected from the group consisting of a plaster model of a patient's upper teeth, a plaster model of a patient's lower teeth, an imprint of a patient's upper teeth, and an imprint of a patient's lower teeth. It is also considered within the ambit of the present invention that more than one object (e.g. 2, 3, 4, 5, 6, 7, 8, 9, 10 or more objects) is placed on the rotatable table in the same measurement cycle so as to calculate a digital 3-D model for more than one object (e.g. 2, 3, 4, 5, 6, 7, 8, 9, 10 or more objects) in only one experimental set-up.
  • more than one object e.g. 2, 3, 4, 5, 6, 7, 8, 9, 10 or more objects
  • a plaster model of a patient's upper teeth and a plaster model of a patient's lower teeth may be placed on the rotatable table at the same time in order to digitize the dentals casts of the upper teeth and the lower teeth of the same patient in one experimental set-up.
  • an imprint of a patient's upper teeth and an imprint of a patient' s lower teeth may be placed on the rotatable table at the same time in order to digitize the imprints of the upper teeth and the lower teeth of the same patient in one experimental set-up.
  • the method is carried out using an apparatus according to the first aspect.
  • the present invention is directed to a cephalometric one-shot 2-D X- ray imaging apparatus comprising means for implementing a method as defined in the second aspect.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Pathology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Veterinary Medicine (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

La présente invention concerne le domaine de l'imagerie numérique, en particulier l'imagerie en trois dimensions (3-D) en dentisterie. L'invention concerne, en particulier, des appareils et des méthodes pour l'imagerie en trois dimensions d'objets, notamment des empreintes dentaires.
PCT/EP2015/076751 2014-11-17 2015-11-17 Appareil d'imagerie par rayons x à prise unique et méthode pour imagerie en trois dimensions d'empreintes dentaires Ceased WO2016079082A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14193456 2014-11-17
EP14193456.2 2014-11-17

Publications (1)

Publication Number Publication Date
WO2016079082A1 true WO2016079082A1 (fr) 2016-05-26

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PCT/EP2015/076751 Ceased WO2016079082A1 (fr) 2014-11-17 2015-11-17 Appareil d'imagerie par rayons x à prise unique et méthode pour imagerie en trois dimensions d'empreintes dentaires

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WO (1) WO2016079082A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023895A (en) * 1989-03-02 1991-06-11 Innovative Imaging Systems, Inc. Three dimensional tomographic system
US6200135B1 (en) * 1997-01-28 2001-03-13 Iris Development Corporation Scanning apparatus fixture for holding impression trays
US20030129565A1 (en) * 2002-01-10 2003-07-10 Align Technolgy, Inc. System and method for positioning teeth
US20080056439A1 (en) * 2005-10-17 2008-03-06 Imtec Imaging, Llc Multi-use CT scanning apparatus
WO2014164405A1 (fr) * 2013-03-11 2014-10-09 Carestream Health, Inc. Procédé permettant de réaliser une surface des dents à partir du balayage par rayons x d'une impression négative

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023895A (en) * 1989-03-02 1991-06-11 Innovative Imaging Systems, Inc. Three dimensional tomographic system
US6200135B1 (en) * 1997-01-28 2001-03-13 Iris Development Corporation Scanning apparatus fixture for holding impression trays
US20030129565A1 (en) * 2002-01-10 2003-07-10 Align Technolgy, Inc. System and method for positioning teeth
US20080056439A1 (en) * 2005-10-17 2008-03-06 Imtec Imaging, Llc Multi-use CT scanning apparatus
WO2014164405A1 (fr) * 2013-03-11 2014-10-09 Carestream Health, Inc. Procédé permettant de réaliser une surface des dents à partir du balayage par rayons x d'une impression négative

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